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Related Concept Videos

Electron Transport Chains01:28

Electron Transport Chains

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The final stage of cellular respiration is oxidative phosphorylation that consists of two steps: the electron transport chain and chemiosmosis. The electron transport chain is a set of proteins found in the inner mitochondrial membrane in eukaryotic cells. Its primary function is to establish a proton gradient that can be used during chemiosmosis to produce ATP and generate electron carriers, such as NAD+ and FAD, that are used in glycolysis and the citric acid cycle.
The ETC is comprised of...
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Mitochondria01:37

Mitochondria

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Mitochondria are eukaryotic cellular organelles that are known to produce energy through a process called oxidative phosphorylation. Besides their primary function, mitochondria are involved in various cellular processes, including cell growth, differentiation, signaling, metabolism, and senescence. Age-related changes cause a decline in mitochondrial quality and integrity due to increased mitochondrial mutations and oxidative damage. Thus, aging can severely impact mitochondrial functions,...
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Electron Transport Chain: Complex I and II01:46

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The mitochondrial electron transport chain (ETC) is the main energy generation system in the eukaryotic cells. However, mitochondria also produce cytotoxic reactive oxygen species (ROS) due to the large electron flow during oxidative phosphorylation. While Complex I is one of the primary sources of superoxide radicals, ROS production by Complex II is uncommon and may only be observed in cancer cells with mutated complexes.
ROS generation is regulated and maintained at moderate levels necessary...
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Electron Transport Chain: Complex III and IV01:43

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During the electron transport chain, electrons from NADH and FADH2 are first transferred to complexes I and II, respectively. These two complexes then transfer the electrons to ubiquinol, which carries them further to complex III. Complex III passes the electrons across the intermembrane space to Cyt c, which carries them further to complex IV. Complex IV donates electrons to oxygen and reduces it to water. As electrons pass through complexes I, III, and IV, the energy released aids the pumping...
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Translocation of Proteins into the Mitochondria01:19

Translocation of Proteins into the Mitochondria

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Mitochondrial precursors are translocated to the internal subcompartments via independent mechanisms involving distinct protein machineries called translocases.
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The Inner Mitochondrial Membrane01:28

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The inner mitochondrial membrane is the primary site of ATP synthesis. The inner membrane domain that forms a smooth layer adjacent to the outer membrane is called the inner boundary membrane. This domain contains membrane transporters that drive metabolites in and out of the mitochondria.  In contrast, the inner membrane network that invaginates into the matrix space is called the cristae membrane. This domain accounts for principle mitochondrial function as it accommodates the protein...
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Related Experiment Video

Updated: Mar 11, 2026

High-Resolution Respirometry to Assess Bioenergetics in Cells and Tissues Using Chamber- and Plate-Based Respirometers
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Mitochondria and Iron: current questions.

Bibbin T Paul1, David H Manz1,2, Frank M Torti3

  • 1a Department of Molecular Biology and Biophysics , University of Connecticut Health , Farmington , CA , USA.

Expert Review of Hematology
|December 3, 2016
PubMed
Summary
This summary is machine-generated.

Mitochondria are vital for cellular functions and iron metabolism. Understanding mitochondrial iron regulation is key to developing therapies for related diseases and cancer.

Keywords:
Ironcancerheme synthesisiron traffickingiron-sulfur clustermitochondria

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Area of Science:

  • Cellular Biology
  • Biochemistry
  • Mitochondrial Medicine

Background:

  • Mitochondria are crucial organelles involved in energy production, biosynthesis, and regulation.
  • They play a central role in cellular iron metabolism, utilizing iron for essential cofactor synthesis.
  • Mitochondrial iron is critical for enzymes involved in oxidation-reduction reactions and DNA synthesis.

Purpose of the Study:

  • To review iron trafficking to mitochondria and normal mitochondrial iron metabolism.
  • To discuss the biogenesis of heme and iron-sulfur clusters within mitochondria.
  • To explore pathologies disrupting mitochondrial iron metabolism and their impact on cellular and systemic health, including cancer.

Main Methods:

  • Literature review using PubMed searches with keywords: Iron, mitochondria, Heme Synthesis, Iron-sulfur Cluster, and Cancer.
  • Consultation of references from retrieved publications.

Main Results:

  • Mitochondrial iron metabolism is essential for cellular processes.
  • Disruptions in mitochondrial iron lead to pathologies affecting cellular and systemic health.
  • Mitochondrial iron dysregulation is implicated in various diseases and cancer.

Conclusions:

  • Significant progress has been made in understanding mitochondrial iron metabolism.
  • Further research into mitochondrial iron regulation is crucial for developing novel therapies.
  • Targeting mitochondrial iron pathways may offer therapeutic strategies for associated syndromes and cancer.